if running locally, dial cache_timeout to zero for js files

Author: sspickle

.gitignore

@@ -5,5 +5,5 @@ bower_components
 /venv
 __pycache__/
 *~
-/ide/secret.py
+/ide/.vscode
 

ide/routes.py

@@ -108,7 +108,10 @@ def idejs_static():
 
 @app.route('/lib/<path:filename>')
 def lib_static(filename):
-    return flask.send_from_directory('../lib', filename)
+    cache_timeout = None
+    if is_running_locally():
+        cache_timeout=0
+    return flask.send_from_directory('../lib', filename, cache_timeout=cache_timeout)
 
 @app.route('/package/<path:filename>')
 def package_static(filename):